基于Mayr-Cassie的配电网络单相接地电弧建模及仿真研究  

Modeling and Simulation of Single-phase Grounding Arc in Power Distribution Network Based on Mayr-Cassie

作　　者：胡文广 王师奇 HU Wenguang;WANG Shiqi(State Grid Jiangxi Electric Power Co.,Ltd.,Pingxiang Power Supply Branch,Pingxiang 337000,China;State Grid Jiangxi Electric Power Co.,Ltd.,Overhaul Branch,Nangchang 330006,China)

机构地区：[1]国网江西省电力有限公司萍乡供电分公司,江西萍乡337000 [2]国网江西省电力有限公司检修分公司,江西南昌330006

出　　处：《电工技术》2020年第9期48-51,共4页Electric Engineering

摘　　要：中低压配电网络中,单相接地故障发生的概率最大,能准确反映接地故障特征的相应数学模型是配电网故障分析的基础。基于弧隙平衡理论,分析了经典Mayr模型和Cassie模型的特点,建立了一种Mayr和Cassie合理结合的电弧模型,进一步研究了弧长参数对电弧特性的影响,反映出接地电弧的物理特性;最后,将此电弧模型用于某10kV配电网络,以间歇性电弧接地的故障形式进行模拟仿真,通过对结果的分析和与实际情况的比较,验证了该电弧模型的正确性,为下一步配电网故障分析打下良好基础。In medium-and low-voltage distribution networks,single-phase grounding faults have the highest probability.Corresponding mathematical models that accurately reflect the characteristics of grounding faults are the basis of fault analysis in distribution networks.Based on the arc gap equilibrium theory,the characteristics of the classic Mayr model and the Cassie model were analyzed,and an arc model that was a reasonable combination of Mayr and Cassie was established.The effect of the arc length parameters on the were characteristics was further studied,reflecting the physical characteristics of the ground arc.Finally,this arc model was used in a 10 kV power distribution network,and the simulation was performed in the form of intermittent arc ground faults.The analysis of the results and comparison with actual conditions verified the correctness of the arc model,which laid a solid foundation for fault analysis of the distribution network.

关 键 词：单相接地故障 电弧模型 间歇性弧光接地过电压 ATP-EMTP 

分 类 号：TM864[电气工程—高电压与绝缘技术]